cc: use Skia's filterBounds() traversal, not computeFastBounds().

filterBounds() is performed in device space, which matches cc's
use case (determining the device-space size of a texture to allocate)
more closely.

Since it also supports the crop rect, this fixes filter regions for
accelerated reference filters (crbug.com/240845).

BUG=240845
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1643983002

Cr-Commit-Position: refs/heads/master@{#372183}
2 files changed